click below
click below
Normal Size Small Size show me how
Chris Mitchell
Chapter 5
| Term | Definition |
|---|---|
| Periodic Table | an arrangement of elements in columns, based on a set of properties that repeat from row to row |
| Period | a row in a periodic table of elements |
| Group | a column of elements in a periodic table |
| periodic law | the pattern of repeating properties displayed by elements in the periodic table |
| Atomic mass unit | one 12th the mass of a Carbon-12 atom |
| Metals | elements that a good conductors of heat and electric currents |
| Transition Metals | elements that form a bridge between elements on the left and right sides of the periodic table |
| Nonmetals | elements that are poor conductors of heat and electric currents. |
| Metalliods | elements with properties that fall between those of metals and nonmetals |
| Valence Electron | an electron that is in the highest occupied energy level of an atom. |
| Alkali Metals | the elements in group 1a of the periodic table not including hydrogen |
| Alkaline Earth Metals | the group in 2a of the periodic table |
| Halogens | The elements in group 7a of the periodic table |
| Noble Gases | elements in group 8a of the periodic table |